<!DOCTYPE html>
<html>
  <head>
    <style>
      html, body {
        margin: 0;
        padding: 0;
        width: 100%;
        height: 100%;
      }
    </style>
  </head>
  <body>
    <canvas id="canvas"></canvas>
    <script src="main.js"></script>
  </body>
  </script>
</html>
